Ok. So we know now that these issues have not been fixed with new update.In my case, I can not reproduce freezing with audio when I use new genuine Gopro batteries or when I am on Karma Grip. If you are on generic no Gopro batteries or your batteries are old, try new genuine Gopro batteries and see if this helps.

Im not sure if my low speeds were not caused by old sd card adapter, i was getting different speeds using different machines. but you brought up an interesting point about the battery, I did have a cheap, not original battery in this time. so thats also a possibility. I just ordered a new sd card sandisk extreme u3 a2 v30. if that doesnt help than i gotto test batteries... **bleep** this is a project. cheers

On pages 41 and 42 of this thread I did 3 posts describing my battery tests plus other power supply sources tests. Check it out. It may help.Gopro 7 firmware does not seem to tolerate less stable power supply.